The SheepShaver virtual machine is working fine through all newer MacOS X versions, from 10.6 to 10.12 (Sierra). Your data and graphics can be exchange using one shared folder of your OS as installed in the Virtual Machine.

The old Mac OS, the programs and document files are installed in a virtual disk (a document file in Mac OS X). For Windows installation you need additionally to install SDL 1.2 Libraries and a GTK +2 Runtime modul. For installing it, you need an old Mac OS ROM file and an installed Classic system as available on older PowerMacs. SheepShaver is available in a new 2014 build for all newer MacOS X and Windows versions. But a valuable way to a further use of MacDiff software have been found, an open source project named SheepShaver, who emulates a PowerMac as a Virtual Machine using Classic Mac OS's between 7.5.2 to 9.0.4. After exchange to a new iMac 24' having MacOS X Snow Leopard, or later Lion all Classic support was terminated. Until 2009, myself I operated with the unchanged code on a G4 in the Classic environment of Mac OS 10.4. Thus, all of the last years there are low activities from my side, although as I know there a couple of users who has gladly to operate with MacDiff (here I would like to thank to all faithful users of MacDiff and the other tools).

Unfortunately, their is no simple way for translation of the source codes, particularly of MacDiff's more than 60.000 code instructions, to switch to a modern OS X savvy programming language having little available free time. The programming tool as used to develope the software, VIP BASIC (Mainstay), was already retired during millenium. The development of the software was discontinued since 2001 after appearence of Mac OS X. Since the last update of MacDiffs free classic software as provided on this page several years passed.

Free Classic MacOS software developed by Rainer Petschick MacDiff.

Old mac os emulator for windows